let html = document.querySelector("#html");
let style = document.querySelector("#style");

let string = `/*hello,这里是月晓
*我将绘制一个太极图
*首先需要一个div
**/
#div1{
    border: 1px solid red;
    width:200px;
    height:200px;
}
/*接下来需要把div变成一个圆
**/
#div1{
    border-radius:50%;
    box-shadow:0 0 3px rgba(0,0,0,0.5);
    border:none;
}
/*一黑一白
**/
#div1{
    background: linear-gradient(90deg, rgba(255,255,255,1) 0%, rgba(255,255,255,1) 50%, rgba(0,0,0,1) 50%, rgba(0,0,0,1) 100%);
}
#div1::before{
    width:100px;
    height:100px;
    top:0;
    left:50%;
    transform:translateX(-50%);
    background:#fff;
    border-radius:50%;
    background: radial-gradient(circle, rgba(0,0,0,1) 0%, rgba(0,0,0,1) 18%, rgba(255,255,255,1) 18%, rgba(255,255,255,1) 100%, rgba(0,0,0,1) 100%);
    
}
#div1::after{
    width:100px;
    height:100px;
    bottom:0;
    left:50%;
    transform:translateX(-50%);
    background:#000;
    border-radius:50%;
    background: radial-gradient(circle, rgba(255,255,255,1) 0%, rgba(255,255,255,1) 18%, rgba(0,0,0,1) 18%, rgba(0,0,0,1) 100%);
}`;
let string2 = "";
let n = 0;

let step = () => {
    setTimeout(() => {
        if (string[n] === "\n") {
            string2 += "<br>";
        } else if (string[n] === " ") {
            string2 += "&nbsp;";
        } else {
            string2 += string[n];
        }
        html.innerHTML = string2;
        style.innerHTML = string.substring(0, n);
        window.scrollTo(0, 9999);
        html.scrollTo(0, 9999);
        if (n < string.length - 1) {
            n += 1;
            step();
        }
    }, 10);
};

step();
